Abstract: The original power system dispatching model is separated from physical model and information

model. Establishing a cyber-physical integrated power system dispatching model can fully analyze and explore the

regulation ability of adjustable resources，expand the dispatchable space of power system，and enhance the grid's

ability to consume renewable energy. Based on the existing power system dispatching framework in China，a cyberphysical integrated day-ahead and intra-day dispatching framework for the power system was proposed，under which the source-grid-load model of the power system was established to form a cyber-physical integrated day-ahead and intra-day dispatching model for the power system. Based on the proposed model，the optimal day-ahead and intraday dispatching strategy was proposed with the objective of economic dispatching. The effectiveness of the proposed strategy was verified by example analysis，and the results show that the construction of cyber-physical integration in power systems can reduce the operation cost of system. Finally，it was pointed out that the construction of multitimescale hierarchical cyber-physical integrated power system should be goal-oriented in the process of cyberphysical integration construction of power system.

      Key words: cyber-physical integration；power system dispatching framework；day-ahead and intra-day；multitimescale